Q.Read the following sources of land pollution carefully and choose the correct option : I. Improper human activities II. Untreated industrial waste III. Practice of primitive subsistence agriculture IV. Use of pesticides and fertilizers Options : (A) Only I, II and III are correct (B) Only II, III and IV are correct (C) Only I, II and IV are correct (D) Only I, III and IV are correct

To understand why horticulture stands out, we need to look at what each type of farming involves and how much human effort it requires. Labour intensity here means the amount of human work — planting, tending, harvesting, sorting — per unit of land.

Horticulture is the cultivation of fruits, vegetables, nuts, seeds, herbs, sprouts, mushrooms, algae, flowers, seaweeds, and non-food crops such as grass and ornamental trees and plants. These crops are delicate, perishable, and often require individual attention. A single tomato plant may need staking, pruning, watering by hand, pest inspection, and careful picking at just the right moment. Flowers must be cut at dawn and graded by size and colour. This is not work that machines can easily replace — it is hands-on, skilled, and continuous throughout the growing season. That is why horticulture is famously labour-intensive, especially in countries like India where small family farms grow vegetables and flowers for local markets.

Now compare the others. Subsistence agriculture is farming primarily to feed the farmer's own family. It can be labour-intensive in the sense that the farmer does everything by hand, but the scale is small and the crops — like millet, maize, or cassava — are often hardy and require less constant care than horticultural crops. The labour is spread thinly over a long season, not concentrated in delicate daily tasks.

Co-operative farming is an organisational model where farmers pool their land, resources, and labour, but share the produce. The farming itself could be any type — it might be wheat or rice grown with machinery. The co-operative structure does not by itself make the work more labour-intensive; it just changes who does it and how profits are shared. …

The key here is understanding the classification of farming systems in India based on water source. Rainfed farming is the opposite of irrigated farming. It relies solely on natural precipitation, which makes it highly dependent on the monsoon's timing and amount. This type of farming is often practised in regions where canal or well irrigation is not available.

1. Eliminate the distractors first.

   • Productive farming (A) is not a standard classification — it's a vague term, not a synonym for rainfed agriculture.
   • Protective farming (B) refers to farming aimed at subsistence or risk-minimisation, often in dry areas, but it is not the direct technical name for rainfed farming.
   • Zaid (D) is a specific cropping season (summer) in India, not a type of farming based on water source.

2. Identify the correct term. …

The question asks you to identify which of the listed items are genuine sources of land pollution. Land pollution means the contamination or degradation of the land surface, usually through human activities that introduce harmful substances or alter the natural soil environment.

Let’s examine each source one by one.

1. Improper human activities — This is a broad category that includes littering, deforestation, overgrazing, and poor waste disposal. All of these directly contribute to land degradation. So I is correct.

2. Untreated industrial waste — Factories often release toxic chemicals, heavy metals, and non-biodegradable materials into the soil. Without treatment, these pollutants seep into the ground, making the land infertile and hazardous. So II is correct.

3. Practice of primitive subsistence agriculture — This refers to traditional farming methods like slash-and-burn or shifting cultivation. While these can cause temporary deforestation and soil erosion, they are not typically classified as pollution sources. Primitive subsistence agriculture is often low-impact and uses no synthetic chemicals; the land is usually allowed to recover. It is not a direct cause of land pollution in the same sense as industrial waste or pesticides. So III is incorrect. …

The question asks us to identify which agricultural system relies fundamentally on fodder crops—plants grown specifically to feed livestock rather than for direct human consumption. To answer this, we need to understand what each type of agriculture emphasizes and how animals fit into the farming system.

Mixed farming represents the integration of two complementary activities: growing crops and raising animals on the same holding. The farmer divides land and effort between food grains, commercial crops, and crucially, fodder crops like clover, alfalfa, berseem, and various grasses. These fodder crops serve a dual purpose. They feed the cattle, sheep, pigs, or poultry that the farmer keeps, and the animals in turn provide manure that enriches the soil for the next crop cycle. The system is self-reinforcing: better-fed animals produce more manure, which leads to better crops, which can support more or healthier animals. This type of farming is widespread in temperate regions of Europe, North America, and parts of Australia, where both arable land and grazing are viable.

Mediterranean agriculture, by contrast, evolved in the hot, dry summers and mild, wet winters around the Mediterranean Sea and similar climates elsewhere. The focus here is on drought-resistant tree crops—olives, grapes, figs, citrus—and wheat or barley grown in the wetter months. Livestock, particularly sheep and goats, do appear, but they graze on natural vegetation or stubble rather than on specially cultivated fodder. The system does not depend on growing fodder crops as a planned component. …