Fertiliser advisory applications software


The MacroBil creates a farm-level nutrient (N,P,K) balance “on the field”.
The balance considers the following sources of nutrient input to the soil:

  1. mineral fertilisers,
  2. natural fertilisers,
  3. organic fertilisers,
  4. ploughed by-products of crop,
  5. biological nitrogen fixation (legume residues, ploughed legume catch crops),
  6. atmospheric precipitation.

On the outflow side, the uptake of the nutrient in crops is taken into account.
The application is particularly helpful in carrying out the tasks resulting from the Regulation of the Minister of Environment of 23 December 2002 on detailed requirements to be met by action programmes aimed at limiting nitrogen outflow from agricultural sources (Journal of Laws of 2003, No. 4, item 44).


The NawSald is aimed at agricultural producers and agricultural advisors as a tool for making on-farm fertilisation plans for arable land following the principles of sustainable mineral management.
On sustainable farms, mineral fertilisation should be treated as a complement to organic fertilisation. The basis for sustainable fertilisation is the most precise determination of the number of natural fertilisers available on the farm and the amount of nutrients contained in them. An integral part of NawSald is a module allowing the simulation of manure production based on livestock production on the farm. The calculated amount of natural fertiliser should be distributed to each field on the farm.

The application enables evaluation of the environmental impact of fertilization by checking the balance of nutrients determined by the “on soil surface” method. A positive balance value indicates that the nutrient input to the field exceeds the nutrient uptake with the crop. A negative value indicates that the uptake by the crop is greater than the nutrient input.

Mineral fertiliser rates are calculated as the difference between the nutrient requirements of plants, and the amount of nutrients supplied to the soil in manure and from other sources (ploughed by-products, nitrogen fixation by legumes, precipitation). The nutrient content of the soil is also taken into consideration.
The NawSald software is a decision support system. The farmer or advisor can adjust the size of fertilizer doses calculated by the program; the effects of changes are visible in the size of the balance of components, and thus can control them.

Plano RSN

The Plano RSN is a tool for drawing up fertilisation plans in farms participating in agri-environmental programmes and in farms located in NVZs.

An integral part of the application is a module enabling simulation of natural fertiliser production on the basis of animal production in a farm. The calculated amount of natural fertilisers should be distributed among individual fields in a farm not to exceed the permissible annual dose of 170 kg of nitrogen.
Doses of mineral fertilisers are calculated as the difference between the nutritional needs of plants and the amount of components supplied to soil in natural fertilisers and from other sources (ploughed by-products, legume nitrogen fixation and precipitation).

The system allows full control of the inflow of nutrients to a field. It also creates a balance of NPK components using the “on-field” method for the whole farm.

Fertiliser quantity calculator

The application is designed to calculate the amount of natural fertilisers available on the farm in a given crop year. The program calculates the amount of natural fertilisers and their N, P2O5 and K2O nutrient content. Above information facilitates planning of fertilisation in an agricultural facility.

The calculations are made on the basis of the analysis of the livestock kept in the farm in the crop year by default, e.g. from 1st April of the current year to 31st March of the following year.
It is assumed that the manure produced during this period will be used in crop production in the period from autumn of the current year to spring of the following year.

Calculator available  here…


Contact for software applications

e-mail: amatczuk@iung.pulawy.pl
phone: +48 81 4786 755