A Simplified Soil Nutrient Information System:Study from the North East Region of India

Abstract

Soil fertility has direct implications on the agricultural production scenarios of a region. Surface soil samples at 1 km grid were collected to assess the fertility status of Lakhimpur district (Assam) in North East India. Fertility parameters like soil organic carbon, available nitrogen, phosphorus, potassium, iron, manganese, zinc and copper were determined using standard analytical procedure. Spatial distribution maps of the soil parameters were generated using regularized spline method in ArcGIS 10.0. The average soil organic carbon content was 1.05% and the maximum area was under high availability status (78%). In the case of nitrogen, 57% of the area was under low availability status. In the case of available potassium and phosphorus, the areas under low availability status were 48% and 49% respectively. But for micronutrients, in general, the availability status was high except for zinc, which indicated that 40% of the area was under low availability. A methodology was developed to integrate the individual nutrient layers using a set of decision rules to identify the multinutrient deficient zones. The integrated map showed that 24% of the area had multiple nutrient deficiencies and fell under high priority zone that warrant immediate nutrient management interventions to mitigate the situation.

Spatial Distribution of Soil Nutrients in Farmland in a Hilly Region of the Pearl River Delta in China Based on Geostatistics and the Inverse Distance Weighting Method

“…Most researches showed that parent material has the most significant effect on soil formation and soil nutrient content, and soil nutrient content is also closely related to climate, rainfall, vegetation, land use types and agricultural production measures [43]. It is well known that soil parent materials are the material carriers and there are differences in soil nutrients for the difference of parent materials [2,19,43]. It commonly existed a significant correlation between parent material and soil nutrients, that is, the higher the mineral element content of soil parent material, the higher the content of plant nutrients in soil in the corresponding area.…”

“…Soil nutrients are important indicators of cultivated land quality, which is determined by two aspects: soil fertility and spatial location [1]. Soil fertility, which is closely related to the concentrations of soil nutrient elements, is the foundation of soil productivity [2]. Soil nutrient elements can be classified into essential, beneficial, and toxic elements.…”

“…There have been many studies of soil nutrient properties in recent years. For example, some studies have assessed soil nutrient conditions in the northeast region of India [2], and predicted their spatial distribution in farmland in Croatia [7]. Similar studies have been conducted in China in Yunnan Province [8], Beijing [9,10], and Shanxi Province [11], as well as in hilly areas of Guangdong [12], Sichuan [13], and Hebei Province [14].…”

Spatial Distribution of the Fertility Parameters in Sericulture Soil: A Case Study of Dimapur District, Nagaland

“…Dimapur district level data from Eri and Muga farms were designed in MS Excel and generated as a point layer in ArcGIS 10.3 comprising all the nutrient availability information in the attribute table. The regularised spline interpolation technique was employed for the point data to create spatial distribution layers for soil pH; organic carbon; and available N, P, K, S, B, Fe, Mn, Zn and Cu in a GIS environment [1,8,22,23]. The layers were categorised with their threshold values.…”