Having Soil Test

       January 1, 0000    1324

 

Soil Testing compares soil characteristics and crop nutrient requirements and ascertains fertile soil. Thus it ensures no excess fertilizer use or pollution providing substance. It also furnishes the information required to maintain soil fertility. Elements are separated and measured. The fertilizer to be used is suggested. PH, Humic substance and acidity are measured to deduce if lime is necessary. If lime exceeds required amount PH raises and nutrients become less obtainable to plants. Decisions taken on the basis of soil tests produce high yields.

Types

The Regular tests include determination of phosphorus, potassium, organic matter (sand, silt and clay), lead, pH and lime requirement and soluble salts from excess fertilizer or road salt. The Professional tests include determination of micronutrients (zinc, copper, iron, manganese), calcium, magnesium, nitrate, sulfur and boron. The Laboratory takes three to five days to prepare the results. Tests can be classified as The Basic Forage Test (neutral detergent fiber, digestible nutrients, calcium, phosphorous, magnesium, potassium) or the Basic Grain Test (for moisture, dry matter, protein, acid detergent fiber).

Sampling

Take the sample some months before starting plantation. Where the area is level and soil seems uniform collect a mixed sample. If the lawn is large and different areas differs in fertility collect one sample from each area. Avoid samples from parts near the periphery or trees or apartments. Take a spade and sampling tube. Avoid brass, bronze and galvanized equipment as they adulterate the sample with copper and zinc. Brush any grass or garbage on the top. The sampling depth is as follows- Existing grass (0-3”), New grass (0-6”), Garden (0-6”), Trees (0-12”). Place the soil in a clean container. Collect samples from five different spots in the chosen piece of land. Mix these samples well to make a mixed sample. Send half a kg sample to the laboratory. Record your name, address and sample identification on the box (eg. FYARD, BYARD, GRASS). Sampling is mostly carried out in spring or fall. Different samples from areas varying in colour, texture, crop pattern and slope have to be taken. The University of Tennessee Soil and Forage Test Laboratory (located in Nashville) carries out this test from 1949.
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