micronutrients essential for plant growth justify the answer with suitable explanation
Answers
Due to higher yields, commodity prices and crop input costs, growers are reviewing all potential barriers to top grain production, including micronutrient deficiencies.
In the major crops and production areas of North America, the micronutrients most often supplied by fertilization include zinc, manganese, boron and iron.
Micronutrient deficiencies can be detected by visual symptoms on crops and by testing soils and plant tissues.
The most reliable micronutrient soil tests are for zinc, boron, copper, and manganese. Though adequate, these tests are not as precise as those for soil pH, potassium and phosphorus.
Plant tissue analysis is more reliable than soil testing for identifying many micronutrient problems, and can also supplement soil test information.
Most often, micronutrients are soil-applied in a band at planting, or foliar-applied, as these methods allow lower use rates of sometimes expensive materials.
Micronutrients are essential elements that are used by plants in small quantities. For most micronutrients, crop uptake is less than one pound per acre. In spite of this low requirement, critical plant functions are limited if micronutrients are unavailable, resulting in plant abnormalities, reduced growth and lower yield. In such cases, expensive, high requirement crop inputs such as nitrogen and water may be wasted. Because of higher yields, higher commodity prices and higher costs of crop inputs, growers are reviewing all potential barriers to top grain production, including micronutrient deficiencies. This Crop Insights will discuss general micronutrient requirements, deficiency symptoms, soil and plant sampling, and fertilization practices. Future Crop Insights articles will discuss specific crops, their micronutrient or secondary nutrient requirements and management considerations.
Plant Requirements and Soil Availability
There are 16 elements essential to growth of crop plants:
Supplied by air and water: carbon, hydrogen, oxygen
Macronutrients: nitrogen, phosphorous, potassium
Secondary Nutrients: calcium, magnesium, sulfur
Micronutrients: boron (B), chlorine (Cl), copper (Cu), iron (Fe), manganese (Mn), molybdenum (Mo), and zinc (Zn).
The 7 micronutrients are sufficient in most soils to meet crop needs. However, some sandy soils and other low-organic matter soils are naturally deficient in micronutrients, and high pH soils may make some micronutrients less available and therefore deficient. In the major crops and production areas of North America, the micronutrients most often supplied by fertilization include zinc, manganese, boron and iron. Basic chemical properties of micronutrients help determine their availability in soils
Answer:
Micronutrients are essential for plant growth they play an important role in balanced crop nutrition. They include B, Cute, Fe, Mn, MO, zn, Ni, Cl .They are as important to plant nutrition as primary and secondary macronutrients ,though plants don't require as much of them .A lack of the micronutrients in the soil can limit growth ,even when all other nutrients are present in adequate amounts